Changeset 2299914 in mainline for genarch/src/mm/as_ht.c

Timestamp:

2006-03-16T12:57:31Z (19 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

e898a8d7

Parents:

b7dcabb

Message:

Page table locking.

File:

• genarch/src/mm/as_ht.c (modified) (2 diffs)

genarch/src/mm/as_ht.c

@@ -35 +35 @@
 #include <memstr.h>
 #include <adt/hash_table.h>
+#include <synch/spinlock.h>
 
 static pte_t *ht_create(int flags);
 
+static void ht_lock(as_t *as, bool lock);
+static void ht_unlock(as_t *as, bool unlock);
+
 as_operations_t as_ht_operations = {
-        .page_table_create = ht_create
+        .page_table_create = ht_create,
+        .page_table_lock = ht_lock,
+        .page_table_unlock = ht_unlock,
 };
 
@@ -59 +65 @@
         return NULL;
 }
+
+/** Lock page table.
+ *
+ * Lock address space and page hash table.
+ * Interrupts must be disabled.
+ *
+ * @param as Address space.
+ * @param lock If false, do not attempt to lock the address space.
+ */
+void ht_lock(as_t *as, bool lock)
+{
+        if (lock)
+                spinlock_lock(&as->lock);
+        spinlock_lock(&page_ht_lock);
+}
+
+/** Unlock page table.
+ *
+ * Unlock address space and page hash table.
+ * Interrupts must be disabled.
+ *
+ * @param as Address space.
+ * @param unlock If false, do not attempt to lock the address space.
+ */
+void ht_unlock(as_t *as, bool unlock)
+{
+        spinlock_unlock(&page_ht_lock);
+        if (unlock)
+                spinlock_unlock(&as->lock);
+}